Were recently reported MHz events planet mass primordial black hole mergers?

Abstract A bulk acoustic wave cavity as high frequency gravitational wave antenna has recently detected two rare events at 5.5MHz. Assuming that the detected events are due to gravitational waves, their characteristic strain amplitude lies at about $$h_c\approx 2.5 \times 10^{-16}$$ h c ≈ 2.5 × 10 -...

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Autor principal:	Guillem Domènech
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/a302e84b0b8441d49509328b981ed162
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spelling	oai:doaj.org-article:a302e84b0b8441d49509328b981ed1622021-11-28T12:11:49ZWere recently reported MHz events planet mass primordial black hole mergers?10.1140/epjc/s10052-021-09853-81434-60441434-6052https://doaj.org/article/a302e84b0b8441d49509328b981ed1622021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09853-8https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract A bulk acoustic wave cavity as high frequency gravitational wave antenna has recently detected two rare events at 5.5MHz. Assuming that the detected events are due to gravitational waves, their characteristic strain amplitude lies at about $$h_c\approx 2.5 \times 10^{-16}$$ h c ≈ 2.5 × 10 - 16 . While a cosmological signal is out of the picture due to the large energy carried by the high frequency waves, the signal could be due to the merging of two planet mass primordial black holes ( $$\approx 4\times 10^{-4} M_\odot $$ ≈ 4 × 10 - 4 M ⊙ ) inside the Oort cloud at roughly 0.025 pc (5300 AU) away. In this short note, we show that the probability of one such event to occur within this volume per year is around $$1:10^{24}$$ 1 : 10 24 , if such Saturn-like mass primordial black holes are $$1\%$$ 1 % of the dark matter. Thus, the detected signal is very unlikely to be due the merger of planet mass primordial black holes. Nevertheless, the stochastic background of saturn mass primordial black holes binaries might be seen by next generation gravitational wave detectors, such as DECIGO and BBO.Guillem DomènechSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Guillem Domènech Were recently reported MHz events planet mass primordial black hole mergers?
description	Abstract A bulk acoustic wave cavity as high frequency gravitational wave antenna has recently detected two rare events at 5.5MHz. Assuming that the detected events are due to gravitational waves, their characteristic strain amplitude lies at about $$h_c\approx 2.5 \times 10^{-16}$$ h c ≈ 2.5 × 10 - 16 . While a cosmological signal is out of the picture due to the large energy carried by the high frequency waves, the signal could be due to the merging of two planet mass primordial black holes ( $$\approx 4\times 10^{-4} M_\odot $$ ≈ 4 × 10 - 4 M ⊙ ) inside the Oort cloud at roughly 0.025 pc (5300 AU) away. In this short note, we show that the probability of one such event to occur within this volume per year is around $$1:10^{24}$$ 1 : 10 24 , if such Saturn-like mass primordial black holes are $$1\%$$ 1 % of the dark matter. Thus, the detected signal is very unlikely to be due the merger of planet mass primordial black holes. Nevertheless, the stochastic background of saturn mass primordial black holes binaries might be seen by next generation gravitational wave detectors, such as DECIGO and BBO.
format	article
author	Guillem Domènech
author_facet	Guillem Domènech
author_sort	Guillem Domènech
title	Were recently reported MHz events planet mass primordial black hole mergers?
title_short	Were recently reported MHz events planet mass primordial black hole mergers?
title_full	Were recently reported MHz events planet mass primordial black hole mergers?
title_fullStr	Were recently reported MHz events planet mass primordial black hole mergers?
title_full_unstemmed	Were recently reported MHz events planet mass primordial black hole mergers?
title_sort	were recently reported mhz events planet mass primordial black hole mergers?
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/a302e84b0b8441d49509328b981ed162
work_keys_str_mv	AT guillemdomenech wererecentlyreportedmhzeventsplanetmassprimordialblackholemergers
_version_	1718408158378983424

Were recently reported MHz events planet mass primordial black hole mergers?

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